Abstract
The objective of this study is to evaluate the flow behavior, build-up kinetics, and mechanical properties of an alkali-activated hybrid matrix using different concentrations of NaOH. The investigated mixtures showed different rheological behaviors depending on the NaOH concentration. The combination of Portland cement and fly ash contributed to the formation of a rigid network when the activator is used at a concentration of 2 mol/L. At this low concentration, the chemical reaction seems to be strongly accelerated. This resulted in an increase in the yield stress, plastic viscosity, and rigidification rate of the mixtures. However, when the concentration of NaOH increased to 14 mol/L, only cement contributed to the development of rigidity, and fly ash did not show any contribution. This resulted in relatively low yield stress, plastic viscosity, and rigidification rate. Moreover, the obtained test results revealed that the compressive strength of mortar mixtures made with cement - fly ash hybrid matrix is higher than that of fly ash-based mortar mixtures.
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Planetoscope - Statistiques Production mondiale de béton (2018). https://www.planetoscope.com/matieres-premieres/1374-production-mondiale-de-beton.html
Criado M, Palomo A, Fernández-Jiménez A, Banfill PFG (2009) Alkali activated fly ash: effect of admixtures on paste rheology. Rheol Acta 48(4):447–455
Davidovits J (1991) Geopolymers – Inorganic polymeric new materials. J Therm Anal Calorim 37(8):1633–1656
Favier A, Hot J, Habert G, Roussel N, d’Espinose de Lacaillerie J-B (2014) Flow properties of MK-based geopolymer pastes. A comparative study with standard Portland cement pastes. Soft Matter 10(8):1134
Davidovits J (1994) Properties of geopolymer cements. In: First international conference on alkaline cements and concretes, pp 131–149
Habert G, D’Espinose De Lacaillerie JB, Roussel N (2011) An environmental evaluation of geopolymer based concrete production: Reviewing current research trends. J Clean Prod 19(11):1229–1238
Mezger T (2006) The rheology handbook : for the users of rotational and oscillatory rheometers
Mostafa A, Yahia A (2015) Performance evaluation of different rheometric shearing techniques to disperse concentrated cement suspension. Appl Rheol 25(3):1–9
Mostafa AM, Yahia A (2016) New approach to assess build-up of cement-based suspensions. Cem Concr Res 85:174–182
Juenger CG, Jennings HM (2002) Effects of high alkalinity on cement pastes, no 98, pp 251–255
Khale D, Chaudhary ÆR (2007) Mechanism of geopolymerization and factors influencing its development: a review. J Mater Sci 42(3):729–746
Ridtirud C, Chindaprasirt P, Pimraksa K (2011) Factors affecting the shrinkage of fly ash geopolymers. Int J Miner Metall Mater 18(1):100–104
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Rifaai, Y., Yahia, A., Mostafa, A., Aggoun, S., Kadri, EH. (2020). Rheological and Mechanical Properties of Alkali-Activated Hybrid Matrix for Self-consolidating Concrete. In: Mechtcherine, V., Khayat, K., Secrieru, E. (eds) Rheology and Processing of Construction Materials. RheoCon SCC 2019 2019. RILEM Bookseries, vol 23. Springer, Cham. https://doi.org/10.1007/978-3-030-22566-7_59
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DOI: https://doi.org/10.1007/978-3-030-22566-7_59
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